#include <iostream>
int main()
{
    constexpr int max = 1000000000;
    int p, q, a;
    std::cin >> p >> q >> a;
    if (p == q) {
        std::cout << (a == 0 ? 0 : max) << std::endl;
    } else if (p < q) {
        const int rep = 100;
        int ans       = max - rep;
        for (int x = 1; x <= rep; x++) {
            if (x * p / 100 < x * q / 100 + a) { ans++; }
        }
        std::cout << ans << std::endl;
    } else {
        const int rep = 1000000;
        int ans       = 0;
        for (int x = 1; x <= rep; x++) {
            if (x * p / 100 < x * q / 100 + a) { ans++; }
        }
        std::cout << ans << std::endl;
    }
    return 0;
}